Combination-calipers



E. WULZ.

COMBINATION CALIPERS.

APPLICATiON FILED JUNE 9.1920.

Patented June 7, 1921.

FIG!

EDWARD WULZ INVENTOR BYWX ATTORNEY EDWARD VIULZ, OF NEW YORK, N. Y.

'COMBINATION-CALIPERS.

nssogeae.

Specification of Letters Patent. Patentgd J *7 1921 Application filed June a, 1920. Serial No. 387,660.

To all whom it may concern:

Be it known that T, EDWARD VVUL a clti- Zen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Comblnaion-Calipers, of which the following is a specification. D

This invention relates to improvements in calipers and to a combination of calipers and attachments whereby the capacity for meas uring and gaging is increased, and whereby the instrument may be made to perform other functions, such as that of a compass and a divider. i v r t The invention provides a combination instrument of the character above referred to,

and orovides with one calipers and a few attachments, the equivalent of a number of instruments of different sizes and character.

The invention also provides a pair of calipers having an additional pair of legs combined therewith in a novel manner and regulated by two feed screws, the additional or extra legs being adjustable independently of the principal pair and of one another.

The inventioii further provides a novel combination of parts, hereinafter more fully set forth and defined in the appended claims.

An embodiment of the invention is i lustrated in the accompanying drawing; where- Figure 1 is a front view of the calipers with certain attachments thereon;

Fig. 2 is a side view of the calipers and attachment shown in Fig. 1;

Fig. 3 is a detail view of the feed screw and nut;

Fig. 4 is a cross section through the feed nut;

Fig. 5 is a detail View of a friction pad, or washer and Fig. 6 is a detail view of one attachment for the legs of the calipers.

In said drawing, numerals 1 and 2 designate the two pivoted members of the calipers, each of the members 1 and conveniently comprising a curved leg, indicated by the numerals 4 and 6, and a substantlally straight leg, as indicated by the numerals 5 and 7. The ends of the legs a and 6 are conveniently rounded, as indicated at 10, in order to make a line contact with the surfaces with which they are brought in touch, and the ends of the legs '5 and? are provided with rounded projections 11, whereby these also may make a line contact with the surface in which they are brought in contact.

The members 1 and 2 may be pivoted together in any suitable way. Conveniently they are clamped between two disks 13 and 14 by a thumb screw 15. Disk 14, the shape of which is shown at 14, Fig. 5, is provided with two small pins 15, fastened therein and fitting into suitable holes in circular disk 13 so as to insure that the action of the thumb screw will draw said disks 13' and 141 fast together. The pressure of the disks on the two halves 1 and 2 of the calipers secures them in any position desired. A friction disk 14' may be interposed between the disk 14 and provided upon a pivoted part 31, which is pressed against the feed screw by a spring 35 bearing on a rounded part 33 of the pivoted part 31. When the piece 31 is against the feed screw, the spring bears at a point on the rounded part on that side of the high part ofsaid round part which results in the springpressing the piece 31 against said feed screw.

When the pivoted piece 31 is turned to move the threads thereon out of contact with the feed screw, the spring 35 bears at that side of the high part of the round piece 33 which results in the spring 35 pressing the piece 31 away from said feed screw, and hence holding the piece 31 out of contact with the feed screw when said part is thrown out of contact with said feed screw. A finger piece 37 serves for conveniently manipulating the pivoted piece 31. A projection 4L1 striking against the nut serves to limit the outward movement of the piece 31.

5O designates a pair of attachments. These attachments may be of various forms. For example, they may be curved arms similar to that shown at Fig. 6 and of great radius, enabling them to straddle large work, or as shown, the attachments may be straight pieces, pointed at one end, as indicated at 51, and provided with rounded projections at their other end, as indicated at 52. When the attachments 50 are of the form and in the position shown-in Fig. 1, the instrument serves as an inside calipers for measuring work of a larger size than that on which the inside calipers 11 are used.

Moreover, when the position of the attachments shown in Fig. l are reversed, with the pointed end 51 outermost, the instrument serves as a divider or a compass.

Any suitable means may be provided for attaching the attachments 50, to the legs 4 and 6. Preferably however, there is used a pair of cap screws 55, a number of screwthreaded holes in each of the legs 4, 6, as the holes 57, 58, 59, 60. The attachments 50, are provided with two, and preferably three slots, preferably elongated, as indicated at 61, 62, 63.

When the cap screws 55 are in the holes 57 and 58, as shown in Fig. 1, the attachments 50 have a certain angular relation to the legs 4, 6. When the cap screws are in the holes 58, 59, the attachments 50 have an other angular relation to the legs 4, 6. And so forth. By changing the position of the attachments 50 on the legs in the manner indicated, the capacity of the instrument as regards different sizes of work, is readily changed. Moreover, by leaving one of the cap screws 55 in the hole 57 and turning the attachment so that the hole 61 therein is brought into register with the hole 58, the reversal of the attachment on the leg is readily accomplished. The hole 61 in the attachment may also be brought into registry with the hole 59 in the leg, and the attachments thereby attached in a manner permitting a greater span between the free extremities than in the foregoing case.

To the legs 5 and 7 of the calipers are attached an extra pair of legs 70 and 71. These are attached to said legs 5 and 7 at the side opposite the feed screw 25, by thumb screws 71, and can be regulated by feed screws 72 which pass through nuts 73, which can pivot around the feed screws 72.

The two juxtaposed pairs of calipers permit an endless variety of useful combinations in practical work. In example, where it is notdesired to alter the position of the legs 4, 6, the legs 70, 71, may be adjusted so sition of each individual leg of the extra:

pair of legs with relation to the principal legs, so that when the principal legs have been ad usted an additional measurement can be made without disturbing said prin cipal legs.

2. .ln a pair of calipers of the typede scribed, a pair of extra legs attached to the principal legs thereof, swiveling connections between aid extra legs and the principal legs, and a pair of swiveling feed screws attached to the principal legs forregulating the position of each individual leg of the extra pair of legs with relation to the principal legs, so that when the principal legs have been adjusted an additional measurement can be made without disturbing said principal legs.

Signed at New York in the county of New York and State of New York this 24th day of May A. D. 1920.

EDWARD vVULZ. 

